Z-coupler



FIG. 1 is a front elevational view of a Z-coupler showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view taken from the rear, left side and top of the Z coupler. 

CLAIM The ornamental design for a Z-coupler, as shown and described. 